fix: Remove shading of guava (#225)
fix: Remove shading of guava (#225)

* fix: Update dependencies to versions without known security vulnerabilities.

* fix: Update Mockito dependencies to versions without known security vulnerabilities.

* fix: Handle null message gracefully.

* fix: Fix issues with ProjectTopicName not being defined by removing sharding of guava library
kamalaboulhosn/pubsub,GoogleCloudPlatform/pubsub,GoogleCloudPlatform/pubsub,kamalaboulhosn/pubsub,GoogleCloudPlatform/pubsub,kamalaboulhosn/pubsub,GoogleCloudPlatform/pubsub,kamalaboulhosn/pubsub,kamalaboulhosn/pubsub,GoogleCloudPlatform/pubsub